In all the other tests like the SunSpider, V8, Peacekeeper etc., Firefox is considreably slower than both Chromium/Chrome and Opera. It is slower in their own Dromaeo benchmark as well. Now, Mozilla releases a new benchmark and “bam” Firefox is twice as fast as Chromium and Opera according to it. Of course all the vendors’ benchmark favors their own browser to a certain extent. But to see such such a huge difference in the result between Kraken and the other benchmarks is intriguing to say the least.

So right now we have an interesting situation -

Google’s V8 Benchmark says Chrome/Chromium is the fastest.
According to Apple’s SunSpider Benchmark, Safari is the fastest.
Internet Exploer 9 is the fastest according to Microsoft’s test.
According to the independent Peacekeeper benchmark, Opera is the fastest.
And now on Mozilla’s Kraken, Firefox is the fastest.
Yes every browser is the fastest browser now.

At the end of the day, it really doesn't matter as long as they are all in the same realm.

My personal test is http://280slides.com/Editor/, since thats the sort of app that is being made possible. I can't really tell the difference between chrome or safari, but I can between them and FF. (On IE it is pretty much unusable)